74HC4046 Model Development

[Phil Hobbs]

On 10/22/2012 03:08 PM, Mike Perkins wrote:

On 22/10/2012 16:42, Jim Thompson wrote:

Quite frankly I don't give a rat's ass whether you use the model or
not. I find the 74HC4046 a piece-a-crap, a rather poor CMOS copy of
my original design, the quite linear MC4024 of nearly 50 years ago.

...Jim Thompson


I have found that the variation of parameters the 74HC4046 from one
manufacturer to another is such that I cannot agree with such a sweeping
statement. I found the Philips/NXP variant a very well behaved device,
whereas others had/have poor VCO control linearity etc.

If you read the datasheet carefully, that good performance only exists

over a certain range of parameters, and is only typical, not guaranteed.
See the list of datasheet references I posted in the other HC4046
thread a few days ago.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

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hobbs at electrooptical dot net
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